PolyPRO (tm) 1 Travel Trailer Covers. Fits uo to 20' L, 118" max H. PolyPRO (tm) 1 Fabric repels water and won't scratch paint. Mildew resistant. Protects against dirt and scratches and is perfect for storage and moderate weather protection. Elasticized bottom corners Provide a more custom fit. PolyPRO (tm) 1 covers include Storage bag and tie-down rope. Warranty 2 year hassle-free warranty.